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COLUMBIA ANALYTTCAL SERVICES,INC. <br /> QA/QC Report <br /> Client: EMCON Associates Service Request: S941424 <br /> Project: TOSCO#11192/0952-090.02 Date Collected: 11/9,10/94 <br /> Sample Matrix: Water Date Received: 11/11/94 <br /> Date Extracted: 11/11/94 <br /> Date Analyzed: 11/14-16/94 <br /> Surrogate Recovery Summary <br /> Hydrocarbon Scan <br /> EPA Method 3510/California DHS LUFT Method <br /> Percent Recovery <br /> Sample Name Lab Code p-Terphenyl <br /> 11192-THP4W-36 5941424-009 99 <br /> 11192-THP3 W-28 S941424-010 108 <br /> Method Blank S941 l 11-WB 94 <br /> CAS Acceptance Limits: 66-123 <br /> Approved By: Date: <br /> 1UXMm". <br /> Page 10 of 15 <br /> Al1AlA*17,h AllrN - r__. A <br />